Fan with central intake

ABSTRACT

A fan with central intake comprises a fan frame, a fan wheel and a driving device. The fan frame provides a hub seat with a passage for fluid flowing through and a joining part in the passage. The fan wheel is received in the fan frame and provides a hub with a through hole being associated with the passage to constitute a central flow route and blades radially extending from an outer annular surface of the hub and extending inward to an end face of the hub to connecting with a receiving part, which is joined to the joining part The driving device is mounted to the fan frame and the fan wheel respectively to rotate the fan wheel. When the fan wheel is rotated with the driving device, the fluid moves along the central flow route to dissipate heat in the center of an article being cooled, the driving device and the joining part so as to enhance heat dissipation efficiency and running efficiency.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to a fan with central intake and particularly to a fan frame with a fan wheel for dissipating heat in an electronic product.

2. Brief Description of the Related Art

Due to development of electronic technology, the central processor is operated with high time pulse to satisfy requirement of high executing speed. However, the central processor with high speed of data treatment accompanies with much more heat generation too.

In order to dissipate the heat, it is necessary to provide a heat dissipation device. Otherwise, the central processor will be shutdown resulting from overheat if there is no excellent heat dissipation device.

Currently, the most popularly used heat dissipation device is the cooling fan because of its low cost. This is why the manufacturers are interested in developing and researching the fan.

But, the main unit of a computer provides a limited space for the fan being located so that how to promote function of heat dissipation with a fan in proper size becomes relatively significant.

Further, referring to FIGS. 1 to 4, the known fan includes a fan frame 11 and a fan wheel 12. The fan frame 11 provides a hub seat 111 with a joining part 112 at the center thereof. The joining part 112 is composed of a bearing 1121 and a spindle 1122. An inlet 113 and an outlet 114 are provided at the fan frame 11 for fluid moving in and out. The hub seat 111 is attached with a motor stator 13. The fan wheel 12 includes a hub 121 and blades 122 with a receiving part 1213 on the hub 121. A motor rotor 14 is arranged at the inner annular surface 1211 of the hub 121 and the blades 122 radially extend outward from the outer annular surface of the hub 121. the receiving part 1213 of the hub 121 is movably attached to joining part 112 of the hub seat 111 such that the rotor 14 can align with the stator 13 and the fan wheel 12 can be fitted in the fan frame.

When the stator 13 is powered on to magnetize the rotor 14, the fan wheel 12 can rotate about the joining part 12 and the blades 122 can drag the fluid to move inward via the inlet 113 and move outward via the outlet 114.

Referring to FIGS. 4 and 5, the fan frame 11 and the fan wheel 12 are mounted to the top of a radiator 16. When the fan wheel 12 rotates, the fluid is actuated to flow inward via the inlet 113 and blow toward the radiator 114 at the outlet 114 and then moves outward through air clearances 161 of the radiator 16. The problem created by the conventional fan is that the fluid does not flow toward the rear side of the hub seat 111 to result in a stagnation zone 15 is created at the rear side of the hub seat 111 while the fluid flows outward and disperses toward periphery of the fan frame. As a result, heat at the center of the radiator 16 is incapable of being dissipated and the heat dissipation capability becomes lowered.

Further, action between the stator 13 and the rotor 14 and rotation of the bearing 1121 are sources of heat generation, which influence heat dissipation efficiency and life span of the fan. Obviously, the conventional fan does not provide a way to discharge the heat sources and it is the reason of the conventional fan provides unfavorable effect of heat dissipation.

SUMMARY OF THE INVENTION

A primary object of the present invention is to provide a fan with central intake in which a flow route is disposed at the center of the fan to reduce a stagnation zone produced by the fan and so as to remove heat from an article being cooled and enhance heat dissipation effectively.

Another object of the present invention is to provide a fan with central intake in which a flow route is disposed at the center of the fan to remove heat from a joining part and a driving device so as to enhance operation efficiency of the fan.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:

FIG. 1 is an exploded perspective view of the conventional fan;

FIG. 2 is another exploded perspective view of the conventional fan;

FIG. 3 is an assembled perspective view of the conventional fan;

FIG. 4 is a sectional view of the conventional fan illustrating the air being moved during the fan being in operation;

FIG. 5 is a sectional view of the conventional fan associated with a radiator illustrating the air being moved during the fan being in operation;

FIG. 6 is an exploded perspective view of the first embodiment of a fan with central intake according to the present invention;

FIG. 7 is an assembled perspective view of the first embodiment of a fan with central intake according to the present invention;

FIG. 8 is a top view of the first embodiment of a fan with central intake according to the present invention;

FIG. 9 is a sectional view of the first embodiment of a fan with central intake according to the present invention illustrating the air being moved during the fan being in operation;

FIG. 10 is a sectional view of the first embodiment of the fan associated with a radiator according to the present invention;

FIG. 11 is a sectional view illustrating the second type passage of the hub in the first embodiment of a fan with a radiator according to the present invention;

FIG. 12 is a sectional view illustrating the third type passage of the hub in the first embodiment of a fan with a radiator according to the present invention;

FIG. 13 is a top view illustrating the fan blade in the first embodiment of the present invention having a twist angle turning left;

FIG. 14 is a top view illustrating the fan blade in the first embodiment of a fan with a radiator according to the present invention having a twist angle turning left;

FIG. 15 is an exploded perspective view of the second embodiment of a fan with central intake according to the present invention;

FIG. 16 is an assembled perspective view of the second embodiment of a fan with central intake according to the present invention;

FIG. 17 is a top view of the second embodiment of a fan with central intake according to the present invention;

FIG. 18 is a sectional view of the second embodiment of a fan with central intake according to the present invention illustrating the air being moved during the fan being in operation;

FIG. 19 is a sectional view of the second embodiment of the fan associated with a radiator according to the present invention;

FIG. 20 is a sectional view illustrating the second type passage of the hub in the second embodiment of a fan with a radiator according to the present invention;

FIG. 21 is a sectional view illustrating the third type passage of the hub in the second embodiment of a fan with a radiator according to the present invention;

FIG. 22 is a top view illustrating the fan blade in the second embodiment of the present invention having a twist angle turning left;

FIG. 23 is a top view illustrating the fan blade in the first embodiment of a fan with a radiator according to the present invention having a twist angle turning left;

FIG. 24 is an exploded perspective view of the third embodiment of a fan with central intake according to the present invention;

FIG. 25 is an assembled perspective view of the third embodiment of a fan with central intake according to the present invention;

FIG. 26 is another assembled perspective view of the third embodiment of a fan with central intake according to the present invention;

FIG. 27 is a top view of the third embodiment of a fan with central intake according to the present invention;

FIG. 28 is a sectional view of the third embodiment of a fan with central intake according to the present invention illustrating the air being moved during the fan being in operation;

FIG. 29 is a sectional view of the third embodiment of the fan associated with a radiator according to the present invention;

FIG. 30 is a sectional view illustrating the second type passage of the hub in the third embodiment of a fan with a radiator according to the present invention;

FIG. 31 is a sectional view illustrating the third type passage of the hub in the third embodiment of a fan with a radiator according to the present invention;

FIG. 32 is a top view illustrating the fan blade in the third embodiment of the present invention having a twist angle turning left; and

FIG. 33 is a top view illustrating the fan blade in the third embodiment of a fan with a radiator according to the present invention having a twist angle turning left.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 6 and 7, the first embodiment of a fan with central intake according to the present invention comprises a fan frame 21 and a fan wheel 22. The fan frame 21 provides an inlet 214 and an outlet 215. A hub seat 211 is located at the outlet 215 with a central passage 212 being disposed in the hub seat 211 for fluid moving through and a joining part 213 in the passage 212. The joining part 213 is composed of a spindle 2131 and a plurality of bearings 2132. A motor stator 23 of a driving device fits with the hub seat 211. The fan wheel 22 has a hub 221 with a central through holes 2211 and a plurality of blades 222 extending radially from the outer annular surface of the hub 221. The blades 222 further extend inward to the center of an end face on the hub 221 to connect with a receiving part 223 with a twist angle turning right side. The motor rotor 24 of the driving device is received in the hub 221.

While the fan of the present invention is in assembling, the hub 221 of the fan wheel 22 is aligned to the hub seat 211 of the fan frame 21 and the receiving part 223 is movably attached to spindle 2131 of the joining part 213. In the meantime, the motor rotor 24 is aligned with the stator 23 and the through hole 2211 of the fan wheel 22 with the passage 212 of the hub seat 211 forms a central flow route for fluid.

Referring to FIGS. 6, 8 and 9, when the stator 23 is powered on, the rotor is magnetized to turn leftward with the fan wheel 22 such that fluid is dragged into the inlet 214 of the fan frame 21 by the blades 222 and flows out via the outlet 215. The fluid passes through the central flow route composed of the through hole 2211 of the hub 221 and the passage 212 of the hub seat 211 fluid into the inlet 214 of the fan frame 21 not only to reduce stagnation zone behind the hub seat 211 but also to dissipate heat generated from rotations of the stator 23, the rotor 24 and the bearing 2132.

Referring to FIG. 10, an article being cooled is joined to the fan of the present invention. The article is a radiator 26. The fan frame 21 with the fan wheel 22 is mounted at the top of the radiator 26. Once the fan rotates, the fluid is moved inward via the inlet 214 and blows toward the radiator 26 at the outlet 215. Then, the fluid disperses outward via air clearances 261 of the radiator 26 such that heat in the radiator 26 can be carried with the fluid flowing outward via the outlet 215 and the fluid passing through the central flow route composed of the through hole 2211 of the hub 221 and the passage 212 of the hub seat 211 can dissipate a great deal of heat at the center of the radiator 26. Further, heat generated from rotations of the stator 23, the rotor 24 and the bearing 2132 can be brought outward as well. Thus, problems of the heat at the center of the radiator always being unable to be dissipated and operation of the fan itself resulting in heat being capable of being sent out due to the stagnation zone created behind the hub can be solved completely to enhance heat dissipation effect and the fan operation efficiency and to extend the life spans of the fan and the radiator.

Referring to FIGS. 11 and 12, the passage 212 of the hub seat 211 in the first embodiment can be diverged downward from the top or converged downward from the top to control outgoing fluid and extend flowing range or control the fluid flowing toward rear side of the joining part 213 so as to allow the fluid at the rear side of the joining part 213 keeping moving and prevent from creating the stagnation zone.

Referring to FIGS. 13 and 14, the blades 222 of the fan wheel 22 in the first embodiment can be provided with a twist angle turning leftward. Under this circumstance, the fluid enters the hub seat 211 from a lateral side thereof and blows toward the radiator 26 at another side thereof so that the same effect and function can be reached as well.

Referring to FIGS. 15 to 23, the second embodiment of a fan with central intake according to the present invention is illustrated. The overall structure and function of the second embodiment are about the same as the preceding embodiment. The difference of the present embodiment is in that the blades 322 extend radially from outer annular surface of the hub 321 and a receiving part 323 is provided at the center of the through hole 3211 of the hub 321 by means of a support device 324. By way of fluid passing through the central flow route composed of the through hole 3211 of the hub 321 and the passage 312 of the hub seat 211, the stagnation zone behind the hub seat 311 can be reduced to dissipate heat at the center of the radiator 36 largely and heat generated from the stator 33, the rotor 34 and the bearing 3132 at the joining part 313. In this way, it is capable of enhancing heat dissipation effect and the fan operation efficiency and extending the life spans of the fan and the radiator.

Referring to FIGS. 24, 25 and 26, the third embodiment of a fan with central intake according to the present invention is illustrated. The third embodiment of a fan with central intake according to the present invention comprises a fan frame 41 and a fan wheel 42. The fan frame 41 provides an inlet 414 and an outlet 415. A hub seat 411 is located at the outlet 415 with a central passage 412 being disposed in the hub seat 411 for fluid moving through and a joining part 413 in the passage 412. The joining part 413 is composed of a spindle 4131 and a plurality of bearings 4132. A motor stator 43 of a driving device fits with the hub seat 411. The fan wheel 42 has a hub 421 with a central through holes 4211 and a plurality of blades 422 extending radially from the outer annular surface of the hub 421. The blades 422 further extend inward to the center of an end face on the hub 421 to connect with a receiving part 423 with a twist angle turning right side. The motor rotor 44 of the driving device is received in the hub 421.

While the fan of the present invention is in assembling, the hub 421 of the fan wheel 42 is aligned to the hub seat 411 of the fan frame 41 and the receiving part 423 is movably attached to spindle 4131 of the joining part 413. In the meantime, the motor rotor 44 is aligned with the stator 43 and the through hole 4211 of the fan wheel 42 with the passage 412 of the hub seat 411 forms a central flow route for fluid.

Referring to FIGS. 24, 27 and 28, when the stator 43 is powered on, the rotor is magnetized to turn leftward with the fan wheel 42 such that fluid is dragged into the inlet 414 of the fan frame 41 by the blades 422 and flows out via the outlet 415. The fluid passes through the central flow route composed of the through hole 4211 of the hub 421 and the passage 412 of the hub seat 411 fluid into the inlet 414 of the fan frame 41 not only to reduce stagnation zone behind the hub seat 411 but also to dissipate heat generated from rotations of the stator 43, the rotor 44 and the bearing 4132.

Referring to FIG. 29, an article being cooled is joined to the fan of the present invention. The article is a radiator 46. The fan frame 41 with the fan wheel 42 is mounted at the top of the radiator 46. The fluid is moved inward via the inlet 214 and passes through the central flow route composed of the through hole 2211 of the hub 221 and the passage 212 of the hub seat 211 and then blows toward the radiator 46 at the outlet 415 during the fan wheel 42 rotating. Thus, the fluid disperses outward via air clearances 461 of the radiator 46 such that heat in the radiator 46 can be carried with the fluid flowing outward via the outlet 415 and the fluid passing through the central flow route composed of the through hole 4211 of the hub 421 and the passage 412 of the hub seat 411 can dissipate a great deal of heat at the center of the radiator 26. Further, heat generated from rotations of the stator 43, the rotor 44 and the bearing 4132 can be brought outward as well. Hence, problems of the heat at the center of the radiator always being unable to be dissipated and operation of the fan itself resulting in heat being capable of being sent out due to the stagnation zone created behind the hub can be solved to enhance heat dissipation effect and the fan operation efficiency and to extend the life spans of the fan and the radiator.

Referring to FIGS. 30 and 31, the passage 412 of the hub seat 411 in the third embodiment can be diverged downward from the top or converged downward from the top to control outgoing fluid and extend flowing range or control the fluid flowing toward rear side of the joining part 413 so as to allow the fluid at the rear side of the joining part 413 keeping moving and prevent from creating the stagnation zone.

Referring to FIGS. 32 and 33, the blades 422 of the fan wheel 42 in the third embodiment can be provided with a twist angle turning leftward. Under this circumstance, the fluid enters the hub seat 411 from a lateral side thereof and blows toward the radiator 46 at another side thereof so that the same effect and function can be reached as well.

While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims. 

1. A fan with central intake, comprising a fan frame, providing a hub seat with a passage for fluid flowing through and a joining part in the passage; a fan wheel, being received in the fan frame, providing a hub with a through hole being associated with the passage to constitute a central flow route and providing a plurality of blades radially extending from an outer annular surface of the hub and extending inward to an end face of the hub to connecting with a receiving part, which is joined to the joining part; and a driving device, being mounted to the fan frame and the fan wheel respectively to rotate the fan wheel; whereby, when the fan wheel is rotated with the driving device, the fluid moves along the central flow route to dissipate heat in the center of an article being cooled, the driving device and the joining part so as to enhance heat dissipation efficiency and running efficiency.
 2. The fan with central intake as defined in claim 1, wherein the joining part has a spindle and a bearing.
 3. The fan with central intake as defined in claim 1, wherein the driving device has a motor stator and a motor rotor.
 4. The fan with central intake as defined in claim 1, wherein the passage in the hub seat diverges downward from the top thereof.
 5. The fan with central intake as defined in claim 1, wherein the passage in the hub seat converges downward from the top thereof.
 6. The fan with central intake as defined in claim 1, wherein the article being cooled is a radiator.
 7. A fan with central intake, comprising a fan frame, providing a hub seat with a passage for fluid flowing through and a joining part in the passage; a fan wheel, being received in the fan frame, providing a hub with a through hole being associated with the passage to constitute a central flow route and providing a plurality of blades radially extending from an outer annular surface of the hub and a receiving part of the joining part on the hub for connecting with the fan frame; and a driving device, being mounted to the fan frame and the fan wheel respectively to rotate the fan wheel; whereby, when the fan wheel is rotated with the driving device, the fluid moves along the central flow route to dissipate heat in the center of an article being cooled, the driving device and the joining part so as to enhance heat dissipation efficiency and running efficiency.
 8. The fan with central intake as defined in claim 7, wherein the joining part has a spindle and a bearing.
 9. The fan with central intake as defined in claim 7, wherein the driving device has a motor stator and a motor rotor.
 10. The fan with central intake as defined in claim 7, wherein the passage in the hub seat diverges downward from the top thereof.
 11. The fan with central intake as defined in claim 7, wherein the passage in the hub seat converges downward from the top thereof.
 12. The fan with central intake as defined in claim 7, wherein the article being cooled is a radiator.
 13. A fan with central intake, comprising a fan frame, providing a hub seat with a passage for fluid flowing through and a joining part in the passage; a fan wheel, being received in the fan frame, providing a hub with a through hole being associated with the passage to constitute a central flow route and providing a plurality of blades radially extending from an outer annular surface of the hub to connect with a receiving part, which is connected to the fan frame; and a driving device, being mounted to the fan frame and the fan wheel respectively to rotate the fan wheel; whereby, when the fan wheel is rotated with the driving device, the fluid moves along the central flow route to dissipate heat in the center of an article being cooled, the driving device and the joining part so as to enhance heat dissipation efficiency and running efficiency.
 14. The fan with central intake as defined in claim 13, wherein the joining part has a spindle and a bearing.
 15. The fan with central intake as defined in claim 13, wherein the driving device has a motor stator and a motor rotor.
 16. The fan with central intake as defined in claim 13, wherein the passage in the hub seat diverges downward from the top thereof.
 17. The fan with central intake as defined in claim 13, wherein the passage in the hub seat converges downward from the top thereof.
 18. The fan with central intake as defined in claim 13, wherein the article being cooled is a radiator. 